The flashcards are incredible, but together with the spaced repetition method they are perfect. But these have a serious defect, they do not notify! So you can’t tell when the minute, half hour, hour, 24 hours, or day has passed to redo the flashcards, which makes the spaced repetition method terribly ineffective. My suggestion is that they add notifications when the flashcards time is over to know when to do them (not something very intrusive either), on all platforms.
- Josue
PD: Sorry for my bad english